Mortising machine



Dec. 23, 1952 c, SANDERS 2,622,638

MORTISING MACHINE Filed OCT,- 20, 1948 2 SHEETS-SHEET l 1 iiillilhhll llllllllhlu 5 uliilll I 'llms Clifton D. Sanders INVENTOR.

(Wow 32% Dec. 23, 1952 c; D, SANDERS 2,622,638

MORTISING MACHINE Filed Oct. 20, 1948 2 SHEETSSHEET 2 F/g.2. l l l l 1 I: 4 w '1 w Clifton D.'$anders INVENTOR.

BY my. Em

Patented Dec. 23, 1952 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to new and useful improvements and structural refinements in mortising machines, and the principal object of the invention is to provide a machine of the character herein described, which embodie in its construction and is powered by an electric hand drill of a conventional type.

An important feature of the invention resides in the provision of a vertically slidable carrier for the hand drill, whereby the mortising tool operatively connected to the hand drill and also supported by the carrier, may be conveniently and expeditiously fed into the Work and subsequently withdrawn therefrom. Another feature of the invention resides in the provision of a gear box which, in effect, performs a double function, namely, that of operatively connecting the mortising tool to the electric drill, and secondly, that of supporting the electric drill in its position on the carrier.

Important advantages of the invention lie in its simplicity of construction, convenience of operation, and in its adaptability to economical manufacture.

With the above more important objects and features in view and such other objects and fea tures as may become apparent as this specification proceeds, the invention consists essentially of the arrangement and construction of parts as illustrated in the accompanying drawings, in which:

Figure 1 is a side elevational view of the invention, the same being partially broken away so as to reveal its construction;

Figure 2 is a top plan view of the device shown in Figure 1;

Figure 3-is a cross sectional view, taken substantially in the plane of the line 3-3 of Figure 1;

Figure 4 is a cross sectional View, taken substantially in the plane of the line 44 in Figure 1;

Figure 5 is a perspective view of the gear housing used in the invention, and Figure 6 is a perspective view, partially broken away, of the tool enclosure used therein.

Like characters of reference are employed to designate like parts in the specification and throughout the several views.

Referring now to the accompanying drawings in detail, the invention consists of a mortising machine designated generally by the reference character If], the same embodying in its construction a suitable base i2 provided with an upright standard assuming the form of a rod M, the lower end portion of the rod M preferably being screw threaded into the base and secured by a suitable lock nut [6. Moreover, a gusset [8 may be welded to the lower end portion of the rod l4 and secured to the base [2 by a suitable screw 20, so as to provide an additional reinforcement for the support M.

A carrier 22, configurated as is best shown in Figure 1, is provided at one edge thereof with a pair of vertically spaced ears 24, 26 which are freely slidable on the support [4, so that the carrier may be lowered and raised as desired. The sliding of the carrier is effected by means of an actuating lever 28 which, in effect, assumes the form of a pair of juxtaposed straps suitably secured together by welding, rivets, or the like. It is to be noted that intermediate portions of the straps are laterally offset so as to provide a clearance space 30 (see Figure 2), and suitable pivots 32 extend through the straps from which the lever 23 is formed and swingably attach the lever to the carrier 22, as will be clearly apparent. The lever 28 is swingable, of course, in a vertical plane, and one end portion thereof is pivotally connected by means of a link 34 to a block 36 which is adjustably secured to the standard M.

In effect, the block 36 assumes the form of a split clamp provided with a clamping screw 38 whereby the link 34 is pivotally attached to the block, and it is to be noted that a suitable compression spring 30 is positioned on the support it between the block 36 and the aforementioned ear 24 of the carrier 22, whereby the carrier is urged upwardly on the standard. Needless to say, the carrier 22 may be p-readjusted on the standard by simply loosening the bolt Or screw 38 and sliding the block 36 upwardly or downwardly on the standard, as desired.

Apart from providing what may be referred to as a pivot connection for the lever 28 in sliding the carrier 22 upwardly and downwardly on the standard Hi, the block 36 also performs an additional function, namely, that of preventing the carrier 22 from rotating on the standard. This latter function is achieved by forming the block 36 with a groove 42 to slidably accommodate an edge portion 44 of the carrier 22, so that while the carrier is quite free to slide upwardly and downwardly on the standard, rotation :of the carrier on the standard is effectively prevented.

A gear box assembly designated generally by the reference character 46 is secured as at 48 to a lower arm 50 of the carrier 22, the assembly d8 including in its construction a hollow cylindrical housing 52 equipped with an extension or socket 5d, the housing 52 providing bearings for a drive shaft 56, a counter-shaft 58 and a driven shaft 5%. Suitable gearing 62 operatively connects the shafts 55, 58, while further gears 64 connect the shafts 53, BE as is clearly shown in Figure l. The driven shaft 63 projects downwardly through a suitable aperture 68 formed in the carrier arm 59 and carries a holder assuming the form of a chuck 68 of a conventional type. A suitable enclosure 10, attached to the 3 arm 50 as at I2, houses the holder 68, but is formed in its lower end with a hushed opening 14 through which a suitable mortising tool I6 may be inserted into the enclosure I and into the holder 68, substantially as shown. If desired, the circumferential wall of the enclosure I0 may be formed with a plurality of recesses I8, whereby the nuts on the aforementioned fastening elements I2 may be loosened or tightened when the enclosure is being removed or installed.

The aforementioned extension 54 of the housing 52 assumes the form of a split clamp, the split edges thereof being provided with a pair of spaced ears 80 through which a clamping screw 82 extends so that the usual cylindrical portion 84 of a conventional electric hand drill 85 may be clamped in the housing extension 54, as shown in Figure 1.

A rotatable spindle 88, carrying the usual chuck 90, extends outwardly through the portion 84 of the drill 86, the chuck 90 being operatively engageable with the aforementioned drive shaft 56 which extends upwardly into the housing extension 54, substantially as shown. If desired, the extension 54 may be provided in one side thereof with an opening 92,, so that a conventional key 94 may be inserted into the extension for the purpose of tightening or loosening the chuck 90. When the key 94 is not in use, it may be conveniently hung on a pair of supporting pins 90 provided on the carrier 22.

It will be apparent from the foregoing that by virtue of the extension 54 of the housing 52, the lower end portion of the drill 85 is retained in position in the carrier 22, while the upper end portion of the drill is preferably provided with a screw threaded boss 98 which is welded, or otherwise suitably secured, to the drill housing.

The boss 98 is adapted to receive a screw threaded stud I00, equipped with a lock nut I02, an end portion of this stud being receivable in an aperture I03 with which an upper arm I04 of the carrier 22 is provided. Needless to say, the arms 50, I04 of the carrier 22 are vertically aligned, and the space 30 in the intermediate portion of the actuating lever 28 is sufiiciently wide as to accommodate the handle portion I05 of the electric drill 80, as will be clearly apparent. The drill 86 receives its supply of electric current through the medium of a flexible cable I08, and it is to be noted that while the housing extension 54 is clamped on the cylindrical portion 84 of the drill, the drill chuck 90 is freely rotatable in the extension 54, so that upon actuation of a suitable switch III) with which the drill 85 i is usually provided, rotation of the chuck 90 will be transmitted by the gear box assembly 46 to the mortising tool I6. The mortising tool may be fed into or Withdrawn from the work indicated at II2 as resting on the base I2, and if desired, an adjustable guide Il4, assuming the form of an angle provided with slots II6, may be attached by suitable clamping screws II8 (extending through the slots H6) to the base I 2, so that longitudinal movement of the work IIZ on the base I2 may be effectively guided while the mortising operation is in progress.

For added convenience, the gear box housing 52, or the extension 54 thereof, may be provided with a laterally projecting handle I20, and it should be understood that when the invention 4 is to be used for mortising doors, or the like, the nut I6 of the support I4 and the bolt 20 of the gusset I8 may be loosened or removed, as the .case may be, so as to permit the standard I4 together with the mechanism thereon to be rotated through approximately degrees with respect to the base I 2 and engaged with the work without interference from the base.

It will be also noted that if desired, the gear box 46 and the drill 86 may be removed as a unit from the carrier 22 and used for boring operations where the drill may be guided by hand, such removal being effected by simply loosening the nut I02 and removing the stud I00 as well as the bolts 48.

It is believed that the advantages and use of the invention will be clearly apparent from the foregoing disclosure and accordingly, further description at this point is deemed unnecessary.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

Having described the claimed as new is:

In a mortising machine, the combination of a carrier including spaced and rigidly connected upper and lower arms, a gear box housing having a lower wall secured to the lower arm of said carrier and extending upwardly toward the upper arm, said housing having a substantially tubular invention, what is upper end portion affording a socket, a vertically disposed electric hand drill having a handle portion provided with a keeper stud engaging said upper arm and including a downwardly extending cylindrical portion provided With a chuck, said downwardly extending portion being disposed in said socket and said chuck extending into said housing, a downwardly projecting second chuck rotatably mounted in the lower Wall of said carrier and the lower arm of said yoke, gears in said housing operatively connecting the second chuck to the first-mentioned chuck, a cylindrical enclosure for said second chuck secured to and depending from the lower arm of said carrier, a downwardly projecting mortising tool connected to said second chuck and rotatably journalled in the bottom of said enclosure, and a clamp provided on said socket and frictionally engaging the downwardly extending cylindrical portion of said drill.

CLIFTON D. SANDERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

